In the experiment in which researcher randomly assign half of the dogs in the study to the new flea prevention medication, and the other half of the dogs in the study will receive their current prevention, this type of experiment design is a randomized block design where the pet types (dogs and cats) are the blocks.
What is randomized block design in experiment design?Randomized block design is a type of experimental design that is used to control for the effects of extraneous variables. It involves dividing the subjects or treatments into groups, or blocks, that are similar with respect to the extraneous variable.
These blocks are then randomly assigned to the treatments being tested. By controlling for the extraneous variable in this way, the randomized block design can reduce error and increase the accuracy of the results.
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Answer:
answer B (Khan)
Step-by-step explanation:
A randomized block design where the pet types (dogs and cats) are the blocks
Find the equation of any line parallel to the line 2x-3y=6
Answer:
The equation of the line that passes through (-2, 3) and is parallel to 2x + 3y = 6 is 2x + 3y - 5 = 0.
Step-by-step explanation:
A roller-coaster car is at the top of a hill. The car and its passengers have a combined mass of 1,088 kilograms. If the hill is 62 meters tall, how much potential energy does the car have?
PE=mgh
67,456 J
330,534.4 J
1,159.8 J
661,068.8 J
Answer:
661,068.8j
Step-by-step explanation:
The car has 661068.8 J of potential energy at a height of 62 m having a mass of 1088 grams.
What is potential energy?Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases.
We know, The gravitational constant is 9.8 m/s².
From the given information, m = 1088 grams, h = 62 meters.
Therefore, The amount of potential energy the car has is,
PE = mgh.
PE = 1088×9.8×62 J.
PE = 661068.8 J.
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Find the rate of change of the function on the interval specified for the real number h  f(x) = 7x+4 on [ x,x+h]
The rate of change of the function on the interval specified as in the task content is; 7.
What is the rate of change of the function on the given interval?It follows from the task content that the rate of change of the function on the interval specified for the real number h  f(x) = 7x+4 on [ x,x+h] is to be determined.
Since the function is a linear function, it follows that the rate of change is a constant and hence is given by;
f'(x) = 7.
Ultimately, the rate of change of the function on the given interval is; 7.
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Consider the following function.
f(x)= |x+5|, x>-5
Find the inverse function f-¹.
I
f-¹(x) =
State the domain and range of f. (Enter your answers using interval notation.)
domain
range
State the domain and range of f-1. (Enter your answers using interval notation.)
domain
range
Inverse function for the function f(x)= |x+5|, x>-5 is f⁻¹(x) = -5 ± x
What is inverse function?An inverse function or an anti function is defined as a function, which can reverse into another function. In simple words, if any function “f” takes x to y then, the inverse of “f” will take y to x. If the function is denoted by 'f' or 'F', then the inverse function is denoted by f-1 or F-1.
Given function,
f(x) = |x + 5| , x>-5
It can be written as
y = |x + 5|
Replacing x with y
x = |y + 5|
Solving for y
y + 5 = ± x
y = -5 ± x
Replacing y with f⁻¹(x)
f⁻¹(x) = -5 ± x
Hence, f⁻¹(x) = -5 ± x is the inverse function for function f(x)= |x+5|, x>-5
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A car purchased for $9,000 depreciates at a constant rate of 16.5%. What will be the value of the car in 6 years.
The value in 6 years is $_____.
round answer to 2 decimal places
The value in 6 years is $3050.43
What is depreciation?The term depreciation refers to an accounting method used to allocate the cost of a tangible or physical asset over its useful life.
Using the formula:
Value = P(1-r)^n
From the question, the original value is $9,000, the depreciation rate is 16.5% or 0.165, and the time is 6 years. Plugging in the values:
Putting the values into the formula
Value = 9000(1-0.165)^6
Value = 3050.43
Hence, the value of the car after 6 years will be $3050.43
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If 3250 was increased by 46%, the result would be
Answer: 4745
Step-by-step explanation:
3250 = 100%
Percent Increase = +46%
46% of 3250 = 1495
3250 (100%) + 1495 (46%) = 4745
In a popular online role playing game, players can create detailed designs for their character's "costumes," or appearance. Landon sets up a website where players can buy and sell these costumes online. Information about the number of people who visited the website and the number of costumes purchased in a single day is listed below.
28 visitors purchased no costume.
319 visitors purchased exactly one costume.
34 visitors purchased more than one costume.
Based on these results, express the probability that the next person will purchase exactly one costume as a fraction in simplest form.
Answer:
319/381
Step-by-step explanation:
You want the probability that a customer will buy exactly one costume, given that the numbers buying 0, 1, or >1 costumes were 28, 319, and 34, respectively.
Exactly oneThe probability is the ratio of customers buying one to total customers:
P(n=1) = 319/(28 +319 +34) = 319/381
This fraction cannot be reduced, so ...
The probability the next person will purchase exactly one costume is 319/381.
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Solve for x
.........
The solution for x in the trapezoid is x = 12
How to solve for x in the trapezoid?
The midsegment of a trapezoid is a line segment that connects the midpoints of the parallel sides of the trapezoid.
The midsegment of a trapezoid is parallel to the bases of the trapezoid and is equal in length to half the sum of the lengths of the two bases. That is:
DE = 1/2 * (KL + JM)
14 = 1/2 * (11 + 3x - 19)
14 = 1/2 * (3x - 8)
14 * 2 = 3x - 8
28 = 3x - 8
3x = 28 + 8
3x = 36
x = 36/3
x = 12
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High Tech Chip Company is expected to have EPS in the coming year of $2.50. The expected ROE is 12.5%. An appropriate required return on the stock is 11%. If the firm has a plowback ratio of 70%, the growth rate of dividends should be
If you took many random samples of a variable with a BIMODAL distribution, the means of your random samples would follow a (normal, uniform, skewed, or bimodal) distribution?
If you took many random samples of a variable with a VERY SKEWED distribution, the means of your random samples would follow a (normal, uniform, skewed, or bimodal) distribution?
Answer:
Step-by-step explanation:
If you took many random samples of a variable with a BIMODAL distribution, the means of your random samples would follow a normal distribution.
If you took many random samples of a variable with a VERY SKEWED distribution, the means of your random samples would follow a normal distribution. This is due to the Central Limit Theorem, which states that as the sample size increases, the distribution of the sample means approaches a normal distribution, regardless of the shape of the underlying population distribution.
The Central Limit Theorem (CLT) is a fundamental theorem in statistics that states that, as the sample size increases, the distribution of the sample means approaches a normal distribution, regardless of the shape of the underlying population distribution. This means that even if the original population distribution is skewed, bimodal, or any other shape, the distribution of the sample means will tend towards a normal distribution as the sample size increases.
The reason for this is that the sample means are essentially an average of a number of independent random variables, and the normal distribution is the result of the combination of many independent random variables. When the sample size is large, the distribution of the sample means becomes very close to a normal distribution, even if the underlying population is far from normal.
In the case of a bimodal distribution, the sample means will still approach a normal distribution as the sample size increases, but the distribution may have a different mean and standard deviation than the original population.
In the case of a very skewed distribution, the sample means will also approach a normal distribution as the sample size increases, but the distribution may still be skewed, just less so than the original population.
In conclusion, the Central Limit Theorem states that the distribution of the sample means will tend towards a normal distribution as the sample size increases, regardless of the shape of the underlying population distribution.
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On a level field a telephone pole 24 feet tall casts a shadow 6 feet long. At the same time of day, another nearby telephone pole casts a shadow 18 feel long. How many feet tall is the second telephone pole?.
The second telephone pole is 72 feet tall. Since the ratio of the height of the first telephone pole to the length of its shadow is 24/6 = 4.
We can use this ratio to find the height of the second telephone pole.
If the second telephone pole casts a shadow of 18 feet at the same time of day, we can set up the following proportion:
height of second pole / length of shadow of second pole = height of first pole / length of shadow of first pole
Letting x be the height of the second pole, we can plug in the values we know and solve for x:
x / 18 = 24 / 6
Multiplying both sides by 18, we get:
x = 72
Therefore, the second telephone pole is 72 feet tall.
The answer is (e) 72.
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Complete question:
On a level field a telephone pole 24 feet tall casts a shadow 6 feet long. At the same time of day, another nearby telephone pole casts a shadow 18 feel long. How many feet tall is the second telephone pole?.
a. 6
b. 12
c. 24
d. 36
e. 72
The profit a company makes decreases exponentially at a rate of 0.9% per year. In 2014, the profit was $9500. Calculate the profit in 2019.
Answer: $9080.13
Step-by-step explanation:
use the equation y=b(x)^t, where b is the original profit, x is the percent remaining after one year, and t is the amount of years.
SUBSTITUTE:
y=9500(0.991)^5
Use calculator, and y=9080.126 in 2019. Round off to $9080.13
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MM
100 POINTSSS WILL VOTE MOST BRAINLIEST
The table lists several points on a polar graph.
θ 0 pi over 6 pi over 3 pi over 2 2 pi over 3 5 pi over 6 π
r 4 2 −2 −4 −2 2 4
Which of the following graphs is represented by the table?
Answer:
r = 4 cos(2θ)
See the attached image for a graph.
Step-by-step explanation:
The points given by the table are in the graph of a cosine rose with 4 petals whose amplitudes are 4.
For the equation r = a cos(nθ), a is the amplitude of the petals (4), and n is half the number of petals, as there are an even number of petals (4/2 = 2).
Hence,
r = 4 cos(2θ)
Mrs Chong paid for a frying pan that cost $64 with some $10, $5 and $2 notes .If she used a total of 15 notes,how many $5 notes did she use?
Required process!
Thank you
For every $2 note used, Mrs. Chong used 3/5 of a $5 note. Since she used 15 notes in total, and the number of $2 notes used must be an integer, we can see that she used 10 $2 notes. That means she used 3/5 * 10 = 6 $5 notes.
What is Inequalities?
Inequalities are mathematical statements used to express the comparison between two values. Unlike equalities (e.g., 3 + 4 = 7), which use the "equals" sign (=), inequalities use symbols such as "greater than" (>), "less than" (<), "greater than or equal to" (>=), and "less than or equal to" (<=) to express a relationship between the values.
Let's call the number of $10 notes Mrs. Chong used as "x".
We know the total amount she paid was $64, and the number of notes used was 15, so we can set up an equation:
10x + 5y + 2z = 64
Where "y" is the number of $5 notes used and "z" is the number of $2 notes used. We know that x + y + z = 15 (because this is the total number of notes used).
We can substitute x = 15 - y - z into the first equation:
10(15 - y - z) + 5y + 2z = 64
Expanding the equation:
150 - 10y - 10z + 5y + 2z = 64
Combining like terms:
150 - 5y + 3z = 64
Subtracting 150 from both sides:
-5y + 3z = -86
Dividing both sides by -5:
y - (3/5)z = 17.2
So, for every $2 note used, Mrs. Chong used 3/5 of a $5 note. Since she used 15 notes in total, and the number of $2 notes used must be an integer, we can see that she used 10 $2 notes. That means she used 3/5 * 10 = 6 $5 notes.
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Choose the answer that is equal to the expression below.
5^2.5^0
Answer:
5
Step-by-step explanation:
The expression 5^2.5^0 is equal to 5^(2.5^0), which can be simplified as follows:
2.5^0 = 1 (because any number raised to the power of 0 is equal to 1)
So, 5^2.5^0 = 5^1 = 5
Therefore, the answer is 5.
pls help me with math i’ll give you brainlist
Answer:
choice C. y = -4/3x + 2
Step-by-step explanation:
slope of a line perpendicular to another line has a slope that is the negative reciprocal of the slope of the first line.
m = -4/3 (negative reciprocal of 3/4)
Now use point-slope form to find the y-intercept (b):
y-2 = -4/3(x-0)
y = -4/3x + 2
One is looking to invest 10 thousand dollars among 5 opportunities. Each investment should be integral in units of 500 dollars ($10K = 20 units). A portfolio corresponds to an investment policy. For example, (5,6,3,2,4) is a portfolio that invests 5 units in the first opportunity, 6 units in the second, 3 units in the third, 2 units in the fourth, and 4 units in the fifth opportunity. The investor has to invest all $10K, and at least one unit in each opportunity. The total number of portfolios is:
There are a total of 13 different ornaments to choose from, with 3 types of ornaments.
What is total number?Total number is a term used to describe the sum of all the values or items within a set. It is usually used to calculate an aggregate or grand total, such as the sum of all the numbers in a list or the total number of people in a population. Total number can also be used to describe the absolute value or quantity of something, such as the total number of days in a year.
When Cherry chooses at least 1 of each type, she will have to select a total of 5 ornaments. This means that Cherry can make a total of 13C5 (13 choose 5) different selections. This is equal to 715 different selections.
This can also be calculated by first selecting 1 ornament from each of the 3 types, which gives 3 different selections. Then, for the 2 remaining ornaments, Cherry can select any of the 13 ornaments, giving a total of 3 x 13 = 39 different selections. In total, this gives 3 + 39 = 42 different selections.
To conclude, Cherry can make a total of 715 different selections when she chooses at least 1 of each type of ornament.
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How many bundles of strip flooring are needed to cover a rectangular floor area 16 ft by 14 ft 6 in size if a bundle of strip flooring contains 25 sq ft, and if 30 % extra must be allowed for side and end matching?
If a bundle of strip flooring has 25 sq ft and 30% extra is provided for side and end matching, 12.2 bundles of strip flooring are required to cover a rectangle floor space 16 ft by 14 ft 6 in size.
How do you find the area of the rectangle?Once the length and breadth of a rectangle are determined, the area is computed. The area of a rectangle may be calculated by multiplying its length and width.
In this question, because the rectangular floor has an area of 16 ft by 14 ft 6 in, we can compute the total area of the floor by multiplying 16 ft by 14 ft 6 in, which is 234 [tex]ft^{2}[/tex]. We also know that a strip flooring bundle comprises 25 square feet. As a result, we must determine how many bundles of strip flooring are required to cover the floor.
We must account for side and end matching, which is computed by increasing the total floor area by 30%. To determine the extra space required for side and end matching, multiply 234 ft2 by 0.3. This equates to 70.2 [tex]ft^{2}[/tex].
We can now compute the total area required to cover the floor. This is 234 [tex]ft^{2}[/tex] + 70.2 [tex]ft^{2}[/tex] = 304.2 [tex]ft^{2}[/tex].
Because each strip flooring bundle includes 25 square feet, we can divide 304.2 [tex]ft^{2}[/tex] by 25 to determine the total number of bundles required to cover the floor.
This corresponds to 12.2 bundles.
Therefore, 12.2 bundles of strip flooring are needed to cover a rectangular floor area 16 ft by 14 ft 6 in size, with 30% extra for side and end matching.
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One cubic foot holds 7.48 gallons of water, and 1 gallon of water weighs 8.33 pounds. how much does 2.6 cubic feet of water weigh in pounds? in tons?
Answer: Weight of water in 1 cubic foot water (in pounds)
Weight of water in 1 cubic foot water (in ounces)=
Step-by-step explanation:
Given: One cubic foot holds 7.48 gallons of water.
One gallon of water weighs 8.33 pounds.
To find the weight of water in 1 cubic foot water in pounds we apply Unitary method.
Weight of water in 1 cubic foot water (in pounds)
⇒Weight of water in 1 cubic foot water (in pounds)
Since , 1 pound = 16 ounces .
Weight of water in 1 cubic foot water (in ounces)=
Step-by-step explanation:
Please help me with this question please
Swimming Pool On a certain hot summer's day, 507 people used the public swimming pool. The daily prices are $1.25 for children and $2.25 for adults. The receipts for admission totaled $761.75. How many children and how many adults swam at the public pool that day?
Answer:384 children and 123 adults swam at the public school.
Step-by-step explanation:
Please help:)
Limits calc questions
======================================================
Explanation:
If we plugged x = 4 into the expression, then we'll have 0 in the denominator. This causes a division by zero error.
Luckily the numerator factors to (x-4)(x-2)^2. This is found by using the Rational Root Theorem, along with either synthetic division or polynomial long division. I'll skip these steps unless you need me to write them out.
Once we know the numerator factors this way, we can then write the following steps:
[tex]L = \displaystyle \lim_{\text{x}\to4}\frac{\text{x}^3-8\text{x}^2+20\text{x}-16}{\text{x}-4}\\\\\\L = \displaystyle \lim_{\text{x}\to4}\frac{(\text{x}-4)(\text{x}-2)^2}{\text{x}-4}\\\\\\L = \displaystyle \lim_{\text{x}\to4}(\text{x}-2)^2\\\\\\L = (4-2)^2\\\\\\L = 4\\\\\\[/tex]
Therefore,
[tex]\displaystyle \lim_{\text{x}\to4}\frac{\text{x}^3-8\text{x}^2+20\text{x}-16}{\text{x}-4}=4\\\\\\[/tex]
You can use graphing software like Desmos or GeoGebra to confirm the answer is correct. WolframAlpha is another good choice.
100 points!!!!!
Using the information for West Coast Entertainment Inc. presented in the table below, determine the following:
1. The number of shares bought and sold on this trading day.
2. Amount of income per share paid to a stockholder in the last 12 months.
3. Percentage of change in the stock's price since the beginning of the year.
Percentage of change in the stock's price since the beginning of the year is: 12.32%
What is stock's price?The price at which a stock's share is currently trading on the market is referred to as the stock price. Every publicly listed company issues its shares at a price, which is an estimation of their value that, ideally, corresponds to the worth of the firm itself.
The market forces of supply and demand govern a company's share price once it becomes public and its shares begin trading on a stock exchange. Price increases will occur if there is a large demand for its shares. A stock's price might be reduced by sellers if the company's prospects for future growth appear uncertain.
Given that,
Closing price today = $21.20
Closing price on the previous trading day= $28.83
Difference between closing price today and closing price on the previous trading day= $21.20 - $28.83
= $7.63
Percentage of change in the stock price since the beginning of the year
= Year-to-date % change
= 12.32%
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A bee weighs 2.5 x 10-4 pounds. A
moose weighs 1.25 × 10³ pounds.
How many bees would equal the
weight of a moose? (Give your
answer in standard form.)
The number of bees that will equal the mass of a single moose is 5 × 10⁶.
How many bees would equal the weight of a moose?Given the data in the question;
Mass of one bee = 2.5 × 10⁻⁴ poundsMass of one moose = 1.25 × 10³ poundsTo determine the number of bees that will equal the mass of a single moose.
Let the number be represented by x.
Hence;
Number of bees × mass of bee = mass of moose
n × ( 2.5 × 10⁻⁴ ) = 1.25 × 10³
Divide both sides by ( 2.5 × 10⁻⁴ ).
n = ( 1.25 × 10³ ) / ( 2.5 × 10⁻⁴ )
n = 1250 / 0.00025
n = 5,000,000
Therefore, the number of bees is 5,000,000.
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Which of the following complexe numbers is equal to (4 + 3i)(5 - 2i)?
20 + i
20+6i
26 + i^2
26 + 7i
Answer:
The product of (4 + 3i)(5 - 2i) can be calculated using the distributive property:
(4 + 3i)(5 - 2i) = 4 × 5 + 4 × -2i + 3i × 5 + 3i × -2i
= 20 - 8i + 15i - 6i^2
= 20 + 7i - 6(-1)
= 26 + 7i
So the answer is (4) 26 + 7i.
I believe the answer is (d) 26 + 7i.
What is the distance from the origin to point A graphed on the complex plane below?
-5-4-3
O √5
O√13
O 9
-94
--
13
A
& 1 14.
543
2
1
+2+
Mark thin ond roturn
-3-
4
4
L
1 2 3 4 5 X
Save and Exit
57
The distance from the origin to point A graphed on the complex plane below is √13, Option C is the correct answer.
What is complex plane?The complex plane in mathematics is the plane made up of complex numbers, with real and imaginary numbers making up the x-axis (also known as the real axis) and the y-axis (also known as the imaginary axis) of the Cartesian coordinate system.
Complex numbers can be geometrically interpreted using the complex plane. They add like vectors when addition is applied. Polar coordinates make it simpler to represent the product of two complex numbers, whose magnitude or modulus is the sum of their absolute values.
The coordinates of the point A are (-3, -2).
If we extend the line from the origin to the point A it forms a right angled triangle with base = 3 and height = 2.
Using the Pythagoras theorem:
c² = a² + b²
Substituting the values:
c² = (2)² + (3)²
c = √13
Hence, the distance from the origin to point A graphed on the complex plane below is √13, Option C is the correct answer.
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Suppose you bought 45 shares of a telecommunications company 4 years ago at a price of $63.00 per share. You just sold it at $71.50 per share. How much money did you make? OOOO $377.50 $382.50 $387.50 $392.50 I don't know One attempt
You made a profit of $382.50 from selling the 45 shares of the telecommunications company.
How to calculate the profit you made from selling the 45 shares of the telecommunications companyFirst we need to determine the total cost of purchasing those shares, and then subtract that from the total revenue from selling them.
The total cost of purchasing the 45 shares at a price of $63.00 per share is:
45 shares x $63.00 per share = $2,835.00
The total revenue from selling the 45 shares at a price of $71.50 per share is:
45 shares x $71.50 per share = $3,217.50
To calculate the profit, we subtract the cost from the revenue:
Profit = Revenue - Cost
Profit = $3,217.50 - $2,835.00
Profit = $382.50
Therefore, you made a profit of $382.50 from selling the 45 shares of the telecommunications company.
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let n be an integer. show that if a, b are relatively prime integers, each of which divides n, then ab divides n.
[tex]a*b[/tex] must contain all of the prime factors of n and the exponent of each factor must be less than or equal to the exponent of n. This means that a*b divides n.
Let n be an integer and a, b be relatively prime integers, each of which divides n. This means that a and b have no common factors other than 1. According to the Fundamental Theorem of Arithmetic, the prime factorization of n can be written as n = p1^k1 * p2^k2 * ... * pn^kn. Since a and b divide n, each of their prime factorizations must contain all of the prime factors of n, and the exponents must be less than or equal to the exponents of n. Therefore, a*b must contain all of the prime factors of n and the exponent of each factor must be less than or equal to the exponent of n. This means that a*b divides n.
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The upper arm length of males over 20 years old in the United States is approximately Normal with mean 39.1 cm and standard deviation 2.3 cm. Use the 68-95-99.7 rule.
a. What range of lengths covers the middle 99.7% of this distribution?
b. What percent of men 20 have upper arm lengths greater than 41.4cm?
5-D rocess The perimeter of a rectangle is 60 meters. The length of the rectangle is 3 more than twice the width. What is the length and width of the rectangle?
Answer:
Width: [tex]9[/tex] Length: [tex]21.[/tex]
Step-by-step explanation:
Let's say [tex]l[/tex] is the length, and [tex]w[/tex] is the width. We can rewrite [tex]l[/tex] as [tex]2w + 3.[/tex] So [tex]2(2w + 3) + 2w = 60,\\4w + 6 + 2w = 60,\\6w + 6 = 60,\\6w = 54,\\w = 9.\\[/tex]So the length of the rectangle is [tex]2 \cdot 9 + 3 = 21[/tex] and the width is [tex]9.[/tex]
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